Implement a Vote Dodge system in all draft modes, but do not allow premade groups of 4 people (draft pick normals) to participate in it due to possible abuse.
4/5 people in the queue must agree to dodge, BUT a reason must be given similar to the way a reason must be selected when reporting someone, AND the chat log of the champion select is immediately screened for keywords that match the reason selected
For example: You queue into a match. Last pick calls mid, but 2nd pick wants mid and locks in. Last pick refuses to accept pick order, and decides to troll and lock in for mid anyway. One player activates the Dodge Vote and the champion select timer pauses while the 3 other players accept the vote, the initiator selects the reason for dodging (in this case something along the lines of "Uncooperative teammate" or "Player Failing to Adhere to Game Rules"), and the chat logs are screened. The screening would detect where the last pick player called mid, but a higher pick called and therefore, given the proper description in the reason select, would rule in favor of the vote. Even if the last pick did not announce his intention to troll and go mid in chat so as to avoid the chat screen detection, the chat screen would detect the pick order discrepancy.
Obviously this is only one example, and would take quite a bit of tweaking. This specific example would help to enforce pick order, and the system as a whole would promote positive behavior in champion select and therefore throughout the entire game. It would also assist a team unfortunate enough to come across a troll or other negative player.
The best part about this system of selecting a reason AND having a chat screen is that the Dodge Vote could not be abused in the event your team's composition is inferior to your enemy's, as this would not be an option for dodging and the chat screen ensures any selected reason is accurate.